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Determination of the Thermal Diffusivity of Edible Films

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Abstract

One of the most important factors in the preparation of edible films regards the choice of ingredients. Edible films are commonly prepared with single or mixed high-molecular-weight compounds like proteins and gums. In the present work, protein and gum-based edible films were prepared and their thermal diffusivity determined by photoacoustics. The films were prepared with different concentrations of four basic ingredients: whey protein concentrate, mesquite gum, sodium alginate, and κ-carrageenan. In single-component films, the highest thermal diffusivity was found in mesquite gum (1.97×10−7m2ċs−1), followed by sodium alginate, whey protein concentrate, and κ-carrageenan samples. In composed films, the highest thermal diffusivity was obtained in a ternary film made of mesquite gum, whey protein concentrate, and sodium alginate in identical parts (5.20×10−7m2ċs−1).

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Tomás, S.A., Cruz-Orea, A., Stolik, S. et al. Determination of the Thermal Diffusivity of Edible Films. International Journal of Thermophysics 25, 611–620 (2004). https://doi.org/10.1023/B:IJOT.0000028494.54816.e6

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  • DOI: https://doi.org/10.1023/B:IJOT.0000028494.54816.e6

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